#include <DHT.h>
#include <LiquidCrystal_I2C.h>
// Define the pin where the DHT22 data pin is connected
#define DHTPIN 15
// Define the type of sensor you're using
#define DHTTYPE DHT22
// Initialize the DHT sensor
DHT dht(DHTPIN, DHTTYPE);
// Define the pin where the potentiometer is connected
#define POT_PIN A0 // GP26 corresponds to ADC0
// Initialize the LCD, set the I2C address to 0x27, and the dimensions to 16 columns by 2 rows
LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  // Initialize serial communication at 9600 baud rate
  Serial1.begin(9600);
  Serial1.println("Hello, Raspberry Pi Pico!");
  
  //Serial.print(tempC);
  //Serial.println(" °C");

  lcd.init(); 
  // Initialize the DHT sensor
  dht.begin();
    // Initialize the LCD
  lcd.begin(16, 2);

  // Turn on the backlight of the LCD
  lcd.backlight();

  // Print a message to the LCD
  lcd.setCursor(0, 0);
  lcd.print("Temp : ");
}

void loop() {
  // Wait a few seconds between measurements
  delay(2000);

  // Read the temperature in Celsius
  float tempC = dht.readTemperature();

  // Check if any reads failed and exit early (to try again)
  if (isnan(tempC)) {
    Serial1.println("Failed to read from DHT sensor!");
    return;
  }

  // Print the temperature to the Serial Monitor
  Serial1.print("Temperature: ");
  Serial1.print(tempC);
  Serial1.println(" °C");
  lcd.setCursor(0, 1); // Set cursor to the beginning of the second line
  lcd.print("          "); // Clear the previous voltage reading
  lcd.setCursor(0, 1);
  lcd.print(tempC, 2); // Print voltage with 2 decimal places
  lcd.print(" * C");

  // Wait a bit before the next loop
  delay(500);
}